Debris collection space for class one chimneys using closure plate
A debris collection space should be provided at the base of a flue unless it is lined or constructed of flue blocks,
or is a factory made metal chimney with a flue box. This can be achieved by providing a space having a volume
of not less than 12 litres and a depth of at least 150mm below the point where flue gases discharge into the
chimney. The space should be readily accessible for clearance of debris, for example by removal of the
appliance.
If the Debris Deflector Panel LEG-DDP01 is to be used, this must be installed into Class 1 brick constructed
chimneys only and having a cross sectional area of not less than 52,258mm sq (9”x9”).
The deflector panel should be fixed to a register plate of a minimum size of 776mm wide x 440mm deep. The
height from the register plate up to the intersection with the flue should be not less than 150mm.
The cut-out size in register plate to accommodate the Debris Deflector Panel should be 360mm long x 215mm
wide.
The installer shall confirm that the chimney is in good condition and has passed a flue performance test before
the appliance can be installed with the flue kit.
The following warning attached to the deflector panel should also be observed:
WARNING:
This appliance is installed to an unlined chimney. For examination of the debris void and condition of
the chimney, refer to the appliance manufacturer’s instructions or remove the whole firebox.
NOTES FOR THE INSTALLER AND END USER
5
Fig. 3a
Fig. 3b
Deflector Panel (LEG-DDP01)
shown fitted to larger plate
LEG-DDP02
150mm
Deflector Panel
Catchment Space
150mm
